Steam-superheater



W. L.RILEY. STEAM SUP-ERHEATER. APPLICATION FILED NOV. 22, 1912. RENEWED AWL-17,1915- 1,344,21 1.

Patented June 22, 1920.

-2 SHEETSSHEET I.

W. L. RILEY.

STEAM SUPERHEATER. APPLICATION FILED NOV. 22, 1912. RENEWED AUG. 17,1915.

1,344,21 1. Patented June 22,1920.

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WILLIS L. RILEY, OF MELLEN, WISCONSIN.

STEAM-SUPERHEATER.

Specification of Letters Patent.

Patented June 22, 1920.

Application filed November 22, 1912, Serial No. 732,885. Renewed August 17, 1915. Serial No. 46,015.

as liable to burn out or break down under the severe use and strains to which a device of its character is necessarilysubjected. Further objects of the invention will be apparent from the following description and obvious to'those familiar with the superheater art.

In the accompanying drawings forming.

part of this specification, Figure 1 is a side elevation partly in section of a detail of the front end of a locomotive illustrating part of my improved superheater connected with the boiler thereof, Fig. 2 is a front sectional view taken on the line X-X, of

Fig. 1 and looking into the smoke chamber toward the fines of the boiler; Fig. 3 is an enlarged section taken on the line B-B of Fig. 2; Fig. 4: is a section of a detail of the superheater illustrating a way in which a superheater coil end may be easily and e1 part A employed, one for the steam pas sage leading to each cylinder although the structures may be incorporated in onewithin the spirit of my invention. The superheater inclines downwardly and forwardly from the dome and is curved outwardly between its ends. Its lower end is secured to the coupling seat G on the saddle leading to one of the steam chests not shown. Both the upper and lower ends of the superheater are secured in place by means of boiler to hold each coil.

flange couplings 2 and bolts 3. These joints accommodate the device to slight movement and expansion and contraction of the metal parts without leaking.

The header is divided into two adjacent longitudinal channels 5 and 6 by a partition 7 which lies crosswise of the locomotive. The channel 5 leads from the steam chamber in the dome F and receives saturated steam from the boiler while the channel 6 conducts the superheated steam to the passage leading to the steam chests of the cylinders of the locomotive. The cross sectional area of channel 5 is less than channel 6 for the purpose of saving material the cubical capacity of channel 5. not necessarily being as great in order that it may accommodate saturated steam to the capacity of channel 6 for the superheated steam. superheating coils or tubes H lie inthe large fire flues 8 which are longitudinally disposed through the boiler and the ends of said tubes are connected one to the channel 5 and the other to the channel 6 and arranged one above the other on one side of the superheater it being understood that a series of coil ends may be disposed on each side of the super-heater as illustrated. It will be furtherunderstood that as many coils may be connected with the superheater as desired, a large flue 8 being rovided in the or the purpose of securing the ends 9 and 10 of each coil in the superheater, holes 11, 12, and 13 are drilled or formed through the walls 14., 7

"and 15 of the superheater in substantially co-axial alinement with the ends of the tube which emerge from the fines 8. The end 9 is rolled and beaded into the hole 11, while the end 10 is rolled and beaded over the walls 14 and 7 (see Fig. 3). Thus the end 9 is connected with the superheated steam chamber of the superheater while the end 10 is in communication wit-l1 the saturated steam chamber. The holes in the walls in which the ends of the coils are not secured form a convenient passage through which rolling, beading and cutting tools may be inserted to secure or remove the ends of the coils. The holes in the walls not directly attached to the coils are plugged securely to prevent leaking of steam.

The plug 16 for stopping the hole 13 is in the shape of a thimble of thin tube steel filled or partly filled with asbestos plaster 17 which prevents burning of the thimble by burning gases in the smoke chamber and also tends to prevent any condensation of steam that may be effected through the plug in the SUPGll'IGlLtGl'. The thimble is rolled and headed over the edges of the hole to form a tight joint. The thimble 18 is longer than the thimble l6 and its inner end projects through the holes 12 and 13 co-axial with the tube end. 5) and is rolled and headed over the edges of said holes to effectively plug the openings. This thimble is likewise filled or partly filled with asbestos plaster 19 or other suitable poor heat conducting material.

In operation saturated steam from the steam dome i passes into the saturated steam compartment 5 of the superheater and thence circulates through the superheating coils and passes into the superheated steam compartment 6. From compartment 6 it egresses to the steam passage in the yoke leading to one of the locomotive engine cylinders. During this operation heat fromthe combustion of gases in the smoke chamber augmented by-the draft produced by the exhaust steam has even effect on the entire superheater surface which is anadvantage over a superheater having outwardly projecting bosses of flanges which catch the draft and produceuneven expansion and contraction and damaging effects.

In case it should happen that a coil bursts or that it is an advantage to cut out the use of a coil while the locomotive is in action the end of a tube may be closed by driving a tapered steel plug 20 (see Fig. 4) through the thimble 1S and into the end9 oi the coil thus temporarily closing the end until permanent and more substantial repairs can be made or a new tube inserted. The thimble 18 is likewise adapted to be securely closed by inserting another plug 21. The opposite end 10 of the burst coil may be similarly closed in a quick and effective manner, the inner plug being lengthened to close the tube in both of the walls 1e and 7.

When making permanent repairs the thimbles and ends of the tubes maybe driven out of the superheater by a tool in a quick and effective manner and a new tube and thimbles rolled and beaded into place.

When desired the end of the tube passing into the saturated steam chamber may be provided with an inner thimble 22 (see Fig. separated from a portion of the tube by asbestos plaster or other suitable insulation This thimble also provides a method of repairing a leaky tube end.

In accordance with the patent statutes I have describedthe principles of operation ofmy invention together with the apparatus which I now consider to represent the best embodiment thereof but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent is 1. A bossless steam superheater having two chambers, one for saturated steam and the other for superheated steam, the Walls of one of said chambers having oppositely disposed holes, a superheating' tube having an end in one of said holes secured into connection with the surrounding walls, a stopper thimble secured in the remainder of said holes to close the same and a filling of poor heat conducting material in said thimble.

2. A bossless steam superheater having two chambers situated side by side, one for saturated steam and the other for superheated steam, the walls of both of said cham bers having openings in substantial registration, a superheating tube having an end secured into connection with the walls of part of said openings and a stopper thimble having a heat resisting and condensation preventing medium therein removably secured in the remainder of said openings to close the'same.

A bossless steam superheater having two chambers, one for saturated steam and the other for superheated steam, the walls of one of said chambers having oppositely disposed openings, at superheating tube having an end in one of said openings secured into connection with the surrounding walls, and a hollow stopper partially filled with a heat resisting-medium secured in the remainder of said openings to close the same.

4. A superheater having a header consisting of a pipe divided into two longitudinal compartments, one compartment being connected with a source of saturated steam and the other compartment connected with a duct for superheated steam, the front and back walls and partition having two sets of openings each set comprising three openings in direct alinement, a superheater coil having one end rolled or expanded into one opening of the first set and the other end rolled or expanded into two openings of the second set, a thimble rolled or expanded into the remaining opening of said first set and another thimble rolled or expanded into the remaining two openings of said second set.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

. lVILLIS L. RILEY. WVitnesses:

H. L. FISCHER, G. H. DIEBACH. 

